1. , , , , , :
Zn + 2l = ZnCl2 + 2.
2. , , , , :
Fe + CuSO4 = FeSO4 + Cu,
u + HgCl2 = Hg + CuCl2.
3. (IV) 2.
: n(2) = 2 | : m = n × M m(2) = n(2) × M(2) (2)=Mr(2)=12+16×2=44/ m(2) = 2 × 44/ = 88 |
m (2) -? |
: 88 (IV).
12.
1. .
.
An + HOH = MOH + Hn
, , . ( ), .
.
, FeCl3c (HCl) (Fe(OH)3)
1. . FeCl3 Û Fe 3+ +3Cl -
2. : .
3. . Fe 3+ + +- Û Fe 2++ +
4.
.
2. .
. 6, 2.
3. , , .
H2SO4 Û 2H++ SO42-
H+ - ( ), ( )
SO42-+ 2+ SO4¯( )
13.
1. .
.
An + HOH = MOH + Hn
, , . ( ), .
: H2SO4 , HNO3, HClO3, HClO4, HCl, HBr, HI
.
, Na2C3 -
1. . Na2C3 Û 2Na+ + C3 2-
2. : .
3. . C32- + +- Û 3 - + -
4. : - - , + - , + - .
.
2. .
. 11, 2.
3. 30 5%- ?
. - 1.
14.
1. .
1. :
|
|
- ( ), ( )
- (-(8-.)), ( );
2. - ( ).
.
1) : Al2+3O3-2
2) (IV): Pb2+4S4-2 → PbS2
3) : Ca+2SO4-2
2. .
. 3, 2.
3. , .
l2 Û 2++ 2l-
2++ SO42- SO4¯( )
l- + Ag+ Ag l ¯( )
15.
1. .
, .
1.
Fe(NO3)3 + 3NaOH = Fe(OH)3 + 3NaNO3
2. ( : , )
Fe(NO3)3 + 3NaOH = Fe(OH)3 ↓ + 3NaNO3
3. , :
(2) , ;
!!!
() : OH-, CO32-, PO43- ..
Fe3+ + 3(NO3)- + 3Na+ + 3OH- = Fe(OH)3 ↓ + 3Na+ + NO3-
4.
Fe3+ + 3NO3 - + 3Na+ + 3OH- = Fe(OH)3 ↓ + 3Na+ + NO3 -
5.
Fe3+ + 3OH- = Fe(OH)3 ↓
2. : .